As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 129 33-40 2768 19DEC18 IND OPEN U LOGPAGES:3055686 AN ACRID ODOR WAS SENSED THREE TIMES. WE BELIEVE THE ODOR COICIDES WITH TURNING ON THE RUNWAY TURNOFF LIGHTS. FACT 20DEC18 12:23 IND FOUND TERMINAL ON LIGHT SWITCH BROKEN INTERNALLY WHICH WAS CREATING THE SMELL. INSPECTED THE WIRES AND FOUND NO DAMAGE. REMOVED/REPLACED LIGHT SWITCH REF MM 33-42-03-2, OPS CHECK NORMAL A/C OK FOR SERVICE.